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#1 (permalink) Old 09-30-2010, 12:51 PM
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My daughter has a 2001 Optima V6 with the check engine light on. We have codes:

P0168, P0755, and P0760.

The codes P0755, and P0760 indicate a problem with the Shift Solenoid "C" and Shift Solenoid "B". Where are they located and are they fairly easy to replace?
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#2 (permalink) Old 09-30-2010, 08:15 PM
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Originally Posted by rpdenney View Post
My daughter has a 2001 Optima V6 with the check engine light on. We have codes:

P0168, P0755, and P0760.

The codes P0755, and P0760 indicate a problem with the Shift Solenoid "C" and Shift Solenoid "B". Where are they located and are they fairly easy to replace?
This trouble code deals with shift solenoid B (P0755) or C (P0760), which sets variable valve position and transfers it to appropriate fluid path. To do this, solenoid valve receives electric signal for TCU to set the proper shift gear proper to the current driving condition and it turns two solenoid valves on and off (combine) depending on the gearshift to set the variable valve position. Corresponding code will be displayed when the input to the E/TCU coincides with criteria. Solenoid Valve for Pressure Control - Sensor type : Normal open 3-way - Operating temperature : -30C~130C - Frequency : LR, 2ND, UD, OD, RED : 61.27Hz (at the ATF temp. -20C above) DCC : 30.64Hz ※ KM series : 35Hz - Internal resistance : 2.6Ω or more - Surge voltage : 56 V

Possibly an internal issue with the transmission valve body, the wiring between it and the TCU or the TCU is the source of the issue. Either way it should go to a reputable repair shop for diagnosis. Any issues with the transmission shifting?

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#3 (permalink) Old 09-30-2010, 08:21 PM
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I asked my daughter and she said no. She said she was driving my son to school (20 mph) and the check engine light came on. She took it to Advanced Auto, who gave her the codes.
She also said the RPM might have been a little high, but she is not sure.
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#4 (permalink) Old 11-21-2010, 04:13 PM
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Have you taken it to a Kia dealer since 2002? Sometime in 2002, they revised the TCM program code to make the 2-3 shift more smooth.

Check Kia Global Info System.
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